My ~amd64 laptop primary user can't sudo after bootup this morning, has left me dead in the water for functions like starting emacs daemon, let alone investigation and repair of the issue. I'd like to provide a package emerge history, but can't

Code:

% sudo ls
Password:
myruser is not in the sudoers file. This incident will be reported.

I haven't changed anything with visudo or otherwise, and the file seems to be unaltered by file date: